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On a recent Teen MomReunion special clip, the former flames did not hold back during their heated feelings over their 23-month-old son, Kaiser.

Photo credit: Splash News

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After the 24-year-old mom brought up her baby daddy's expired license, Nathan wasn't afraid to fight back dirty. “My son is in an unstable environment with two drug addicts,” he claimed in front of Dr. Drew Pinsky. “Yeah, where you see weed in the background and smoking constantly.”

Photo credit: Splash News

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He also conveyed his skepticism about Jenelle's deteriorating health on the show, for which she was hospitalized up to three times. “Now you have these mysterious illnesses?” he dissed to the former drug addict. “You’re not capable of taking care of [Kaiser]. You are totally unstable with all these medical ‘illnesses,’ all these drug abuse problems…”

Photo credit: MTV

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But reality TV dad's nasty comments didn't end there! “I don’t want you to be with me. I mean, how many pounds have you gained? You gained like 30 or 40 pounds, didn’t you?”

Photo credit: Splash News

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This isn't the first time that Nathan has accused his ex and her new squeeze, David Eason, of bad parenting. On another Teen Mom episode that aired May 2, the trio engaged in a heated texting feud after Nathan demanded proof that Jenelle and her boyfriend had the proper material's to take care of their son.

Photo credit: Splash News

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Do you think Nathan was right to lash out at Jenelle? Tell us on Twitter!

jenelle-evans-nathan-griffith-custody-battle-teen-mom-reunion-03

On a recent Teen MomReunion special clip, the former flames did not hold back during their heated feelings over their 23-month-old son, Kaiser.

Photo credit: Splash News

jenelle-evans-nathan-griffith-custody-battle-teen-mom-reunion-06

After the 24-year-old mom brought up her baby daddy's expired license, Nathan wasn't afraid to fight back dirty. “My son is in an unstable environment with two drug addicts,” he claimed in front of Dr. Drew Pinsky. “Yeah, where you see weed in the background and smoking constantly.”

Photo credit: Splash News

jenelle-evans-nathan-griffith-custody-battle-teen-mom-reunion-04

He also conveyed his skepticism about Jenelle's deteriorating health on the show, for which she was hospitalized up to three times. “Now you have these mysterious illnesses?” he dissed to the former drug addict. “You’re not capable of taking care of [Kaiser]. You are totally unstable with all these medical ‘illnesses,’ all these drug abuse problems…”

Photo credit: MTV

jenelle-evans-nathan-griffith-custody-battle-teen-mom-reunion-01

But reality TV dad's nasty comments didn't end there! “I don’t want you to be with me. I mean, how many pounds have you gained? You gained like 30 or 40 pounds, didn’t you?”

Photo credit: Splash News

jenelle-evans-nathan-griffith-custody-battle-teen-mom-reunion-02

This isn't the first time that Nathan has accused his ex and her new squeeze, David Eason, of bad parenting. On another Teen Mom episode that aired May 2, the trio engaged in a heated texting feud after Nathan demanded proof that Jenelle and her boyfriend had the proper material's to take care of their son.

Photo credit: Splash News

jenelle-evans-twitter-feud-mtv-teen-mom-2-01

Do you think Nathan was right to lash out at Jenelle? Tell us on Twitter!